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From: Jason Chien <jason.chien@sifive.com>
To: qemu-devel@nongnu.org,
qemu-riscv@nongnu.org
Cc: Peter Maydell <peter.maydell@linaro.org>,
Andrey Smirnov <andrew.smirnov@gmail.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Marcel Apfelbaum <marcel.apfelbaum@gmail.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Alistair Francis <alistair.francis@wdc.com>, Bin Meng <bmeng.cn@gmail.com>,
Weiwei Li <liwei1518@gmail.com>,
Daniel Henrique Barboza <dbarboza@ventanamicro.com>,
Liu Zhiwei <zhiwei_liu@linux.alibaba.com>,
qemu-arm@nongnu.org (open list:MCIMX7D SABRE / i...),
Jason Chien <jason.chien@sifive.com>
Subject: [RFC PATCH 1/6] include/hw/pci: Add a callback to set the downstream
memory region of a pci bus
Date: Mon, 16 Dec 2024 08:48:52 +0800
Message-ID: <20241216004857.9367-2-jason.chien@sifive.com>
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PCIIOMMUOps.set_memory_region() is introduced to set the downstream memory
region of a pci bus. When PCIIOMMUOps.get_address_space() is already
registered by the pci host(e.g. TYPE_DESIGNWARE_PCIE_HOST),
PCIIOMMUOps.set_memory_region() should be registered as well, so an IOMMU
can designate the downstream memory region for the pci bus.
Signed-off-by: Jason Chien <jason.chien@sifive.com>
---
include/hw/pci/pci.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index c0717e3121..cb3039bce8 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -388,6 +388,19 @@ typedef struct PCIIOMMUOps {
* @devfn: device and function number
*/
AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int dev=
fn);
+ /**
+ * @set_memory_region: set the downstream memory region for a set of
+ * devices on a PCI bus.
+ *
+ * Optional callback, which should be implemented when get_address_spa=
ce()
+ * is registered by the PCI host(e.g. TYPE_DESIGNWARE_PCIE_HOST), which
+ * makes an IOMMU not able to register get_address_space() again.
+ *
+ * @opaque: the data passed to pci_setup_iommu().
+ *
+ * @mr: the downsteam memory region
+ */
+ void (*set_memory_region)(void *opaque, MemoryRegion *mr);
/**
* @set_iommu_device: attach a HostIOMMUDevice to a vIOMMU
*
--=20
2.43.2